hello and welcome to bbc news. we begin the programme with dramatic footage showing the momenta dam burst in brazil, releasing millions of tons of mining waste that engulfed nearby buildings. at least 110 people are now known to have died in the disaster, which happened in the state of minas gerais last month. hundreds of people are still missing. our science editor david shukman reports from the site of the dam in south—east brazil. first, a long cloud of dust, then a nightmare vision of an unrelenting torrent of sludge, the waste from decades of mining racing towards hundreds of unsuspecting people down below. the catastrophe unfolded a week ago, but only now has this video come to light, adding to the sense of loss and of outrage. and difficult for you. this red cross volunteer, henato silveira, leads me to the edge of the disaster zone. seis corpos.

six bodies. he alone has found six bodies. any hope of reaching survivors in this endless sea of mud was quickly dashed. emergency workers are now scouting for any signs of bodies from the air, and they are picking their way over this horrific landscape. we spotted this search team with a sniffer dog in the distance. by the time the wall of mud reached this point, it had already overwhelmed the cafeteria where the miners were having lunch and destroyed the offices of the mine itself, before arriving here, tearing through a hotel and holiday chalets, before surging on over that ridge in the distance and down into the valley beyond, where it caused yet more destruction. and the question that everyone here isjust stunned by is how, in a big, modern, growing economy, this could ever have been allowed to happen. investigators are now on the scene. the dam holding back the waste was owned by one of the world's largest mining companies.

it was inspected only last year. we find a local man, leandro gil, praying for friends lost in the mud. "unfortu nately", he says, "someone just thought about himself. he didn't protect the dam properly. so, after years and years, that's now been revealed." a special mass, seven days since the disaster. there is grief and anger, and the demand for answers will only grow. david shukman, bbc news, in brazil. two of the companies brought in by facebook to sift out fake news says they are pulling out of the deal. snopes, one of more than 30 fact—checking operations working with facebook, pulled out earlier on friday, and in the last few minutes the bbc has confirmed that the associated press has also has ended its deal. our north america technology reporter dave lee is in san francisco and says

this is a very awkward situation for facebook. snopes is seen as one of the leading fact—checking organisations on the internet, and so for them to be pulling out of this deal in the way they have is pretty embarrassing for facebook, and could harm the view that it's trying to nurture, that it's trying to get on top of its misinformation problems. snopes has been working with facebook on this since late 2016. and in their statement today, they did allude to the fact that financially it could be difficult for them. we know in 2017, for example, facebook paid just $100,000 to snopes to do this fact—checking, which is less than the average wage of a single facebook employee. and so it has been suggested that what snopes is trying to do, perhaps, is say to facebook and to push facebook‘s hand and say you need to pay potentialy more money for this service. but facebook, of course, is saying it's just one of many fact—checkers that it works

with, and so their project to control their misinformation problem hasn't been too greatly affected. but yes, it's a slightly embarassing situation for facebook to be in. let's get some of the day's other news: the court of arbitration for sport has banned 12 russian athletes for doping. they include the london olympics high—jump gold medallist ivan ukhov and svetlana shkolina, who won gold at the 2013 world championships. both were given four—year bans. the americans who won silver will inherit gold. the offences of all 12 athletes date back to those sporting events. the italian authorities have impounded the last charity rescue ship operating in the central mediterranean. the sea—watch 3 was detained after being allowed to disembark 47 migrants in the sicilian port of catania. italy's populist government has been trying to stop humanitarian groups from bringing rescued migrants ashore. snow and ice are continuing to cause treacherous conditions on roads in wales and southern england. there are two met office warnings covering much of the uk.

more than 1,000 schools in england and wales were closed on friday after what was the coldest night in the uk for seven years. in a moment we will bring you the latest from one of the worst—affected areas, cornwall. but first, our correspondent duncan kennedy is in longparish in hampshire. the m3 tonight at a full standstill. desperate motorists trying to get home for the weekend. some have been trapped for hours. both lanes were blocked after three lorries jackknifed. traffic had been slow in the run—up to rush hour. the thickening blizzard eventually halting vehicles completely. but it is notjust the m3. we drove across berkshire and hampshire, and a series of smaller roads were also caught up in the chaos. the number of shunts countless, the skidding endless.

although many of the a roads are open, it's the back roads, the b roads, that there's the problem. the gritters were out this morning, but they haven't managed to return, so the snow now is falling on these services. ian crowder had been on his last day of work — where else but at the aa. he was desperate to get home to celebrate, but instead he began his retirement stuck on the a339, and he is still there. it's very picturesque, i'm sure. but being here in the traffic, stationary for nearly five hours now, is not a huge amount of fun. it wasn't just commuters stuck in the snow. the emergency services were not spared either. out in all weathers, but caught out by today's snow. in basingstoke, helpers pushed this ambulance up a hill

after a specialist rescue team also got stuck. one more challenging moment, on the day that february turned the south to freezing. images filmed by drivers trapped on one of the uk's most exposed stretches of road. short of fuel, short of food, the lights ofjamaica inn were a beacon to those who set off into the snow to reach them. the only way i can describe it is like armageddon, and i haven't seen anything like this. there was lorries jackknifed all up this road. there was lorries jackknifed. there was vehicles everywhere. well over 100 cold, hungry and exhausted travellers filled every available corner of the hotel. across the region, others defied the ice and snow to help those in greatest need. one of dartmoor‘s community nurses relied on park rangers to reach her patients. hello! i couldn't do without them.

no way could i do without them. i should just be sat here. the worst—case scenario, i mean, we would walk. we have done that in the past. but, you know, you do have to get to these patients. the grip of winter has intensified hardship. bristol's emergency programme provides help to the city's rough sleepers. basically, they bring sleeping bags to keep us warm. they bring hot drinks, they bring hot food. everything i need, they bring it, just to keep me alive. back at jamaica inn, the surprise guests have rescued abandoned vehicles and headed home. but staff here say they will be ready if they are needed again. robert hall reporting from cornwall. and for all the latest travel information and advice, as well as the weather forecast, you can log on to the website, bbc.com/news. and of course, if you haven't already done so, you can also download the bbc weather app on your smartphone. a woman from east london has become the first person to be convicted of female genital

mutilation in the uk. the old bailey heard that the accused, who is originally from uganda, cut her daughter, who was three at the time. the woman also believed she could silence the police and prosecutors by practicing withcraft. the girl's father was found not guilty. adina campbell reports. it is a crime that has been illegal in the uk for more than 30 years. today, a mother has been found guilty of cutting her three—year—old daughter, the first conviction for female genital mutilation in the uk. at the heart of this case is a three—year—old girl who was caused serious injury as a result of her mother's actions. we can only imagine how much pain she suffered, and how terrified she was. during the trial at the old bailey, the jury heard the 999 call made by the girl's mother, who claimed her daughter had fallen onto a kitchen cupboard while trying

to reach for biscuits. but the jury didn't believe her. the court also heard evidence about the mother's interest in witchcraft. during a police search, two cows‘ tongues and ingredients used to create silencing spells were found in herfreezer at home, next to the names of police officers, social workers and foster carers involved in this case, and the girl's interviews were also played to the jury. she was heard telling her foster carer that she had been cut by an old lady, someone she referred to as a witch, while being held down by her mother. the girl was treated at this hospital in east london. when doctors saw her, she was lying on a towel soiled with blood. her injuries were severe, with three separate cuts on her genitalia. for legal reasons, we can't name the girl's mother. she is 37 and originally from uganda.

the girl's father, a 43—year—old man from ghana, was also on trial for the same offence, but cleared of all the charges against him. today's guilty verdict has resonated with those who have also suffered this type of abuse. hibo wardere was cut when she was six years old. a lot of people are afraid of it because they attach it to a colour, they attach it to a religion, they attach it to different communities. and that's what we fight about. it's like, do not attach it to anything except child abuse. the girl's mother is now facing up to 1a years in prison. she will be sentenced next month. could the world be on the verge of a new nuclear standoff? that is the question being asked after the us suspended a landmark deal which has been in force for more than three decades. it is accusing russia of breaking it. the agreement in question outlaws the use of intermediate—range nuclear missiles stationed on land. washington says moscow has been breaking it for years, something russia denies. laura westbrook reports. in 1987, us president ronald reagan

and soviet leader mikhail gorbachev signed the intermediate—range nuclear forces treaty. it led to hundreds of missiles in both countries being destroyed. three decades later, the us secretary of state made this announcement. russia has jeopardised the united states‘ security interests, and we can no longer be restricted by the treaty while russia shamelessly violates it. nato agrees with the decision by the united states. we continue to call on russia to come back into compliance in a verifiable way, because we don't want a new arms race. this wasn't unexpected. for years, america has been consigned about russia's testing and deployment of a cruise missile that it says breaches

the inf treaty. there's concerns other countries, including china, aren't tied by the accord. for now, the treaty is suspended. the us could pull out formally in six months, but gave russia a final chance to save the deal. i hope that we're able to get everybody in a very big and beautiful room, and do a new treaty that would be much better, but — because certainly i'd like to see that. for its part, the kremlin says this was a political decision. russia denies the missile in question is in violation of the treaty. this was iran's response. the foreign minister tweeted. .. this was the image that let the world know the cold war was coming to an end. 30 years later, many are concerned about the future of nuclear arms control. laura westbrook, bbc news. this is bbc news.

the headlines: dramatic new footage has emerged showing the moment a dam collapsed in brazil. at least 110 people are confirmed dead. facebook has lost one of its key fact—checking partners, the news website snopes. and now the associated press. venezuela's opposition leader, juan guaido, is calling for the biggest mass protests in the nation's history this weekend as he tries to force president nicholas maduro from power. the opposition are demanding new elections to end the political and economic chaos engulfing the country. human rights lawyers have told the bbc there's been a wave of political arrests, with almost 1,000 people detained in recent days. the government denies it tortures prisoners. but our international correspondent 0rla guerin has heard a harrowing account from one woman who says she was beaten and abused. you may find some of 0rla's report upsetting. under darkened skies, caracas waits.

some here hoping for a modern—day liberator to replace president nicolas maduro. but those who dare to oppose him can expect to pay a price. almost 1,000 people have been detained in the past 10 days. we are on oui’ way now to meet one of them. she's a young woman who we can't identify for her own safety. she's just been released and she has a harrowing story to tell. she says she was held in this building, the headquarters of the military police. they interrogated her about a relative, a military officer suspected of plotting against the president. translation: they tortured me.

they put a plastic bag over my face and choked me. then they put my head in a bucket of water to try to drown me. i fainted and they beat me, to wake me up. they put a gun in my mouth and cocked it. they said they wanted answers fast, and that they loved to see people suffer. their boss told them all to rape me. they lifted my shirt and took off my bra and they touched me. did you think that you might be killed? translation: yes, because they were constantly saying it. they said they were going to kill me and throw me in the river. they said, "we are the government "and nobody can do anything against the government". and eading human rights lawyer alfredo romero says venezuela's government is in overdrive, trying to silence dissent.

now we can talk also about generalised persecution, generalised detentions. that they detained anyone in order to intimidate people and produce what they are producing, this fear of protesting. and that's what is going on. but some, like federica romer, a politics student, are determined to keep up the fight. she says being a mother to 6—month—old carlota means she has to protest. this is for her, you know? this is for her. before i had her, ifelt invincible and i did not care. and now that i have her, of course, i'm scared to go out. i'm terrified. but this is absolutely for her, you know? ‘cause she is the next generation of this country. they are the ones who are going to hold this country up. federica is preparing to go back out

on the streets tomorrow at a mass demonstration called by the opposition, gas mask at the ready. 0rla guerin, bbc news, caracas. sir david adjaye, the renowned british ghanaian architect, has told the bbc that a museum celebrating black british culture is long overdue. among sir david‘s most important designs is the national museum of african american history and culture in washington, dc. here, a new exhibition of his work is opening at the design museum in london, and he‘s been talking to our arts editor will gompertz. he might be one of the most in—demand architects in the world today but it has not been an easy ride to the top for sir david adjaye, who, as a young british ghanaian architect in the 1990s, found work difficult to come by. because you are black, did you find it hard to get commissions, to be heard? yeah, i mean, well, i didn‘t

get any commissions. it just. .. i was not part of any kind of patronage like that. architecture is kind of like an insider game, because it requires a certain generation to give you, or to give access to you, or to sort of bless you, as, you know, being good enough to join the club, as it were. and i didn‘t have any of that access. so he started out designing spaces for old art school friends, before coming to public attention with the ideas store library in east london, and then achieving global fame as the architect of the museum of african—american history and culture in washington, dc. what we wanted to do was to make a museum that followed the narrative of the story, to take you into the depths of the earth and to kind of deal with that deep, troubling history. ironically, that site was a slave market, so you literally are going through troubled earth, as it were. and then you rise up and have this overview and you are in the light. do you think there‘s a place in britain for something similar, a museum to celebrate... black culture in britain? i think that it‘s long overdue and i think there should be a commission to understand this,

because there is a huge... story. and, you know, i think that most people think that black britain started with the windrush. it started way before that! there were black people right back to the elizabethan period. i think that the contribution of black people in, sort of, english isles is an important discussion, and would empower generations of black kids to feel the connection that they already have to england, it is like home, but to feel empowered that they are part of the, the sort of language and part of the dna of the roots place, too, and have a place in it towards the future. it‘s really amazingly important, the representation of people in the sort of cultural tropes of the nation. that‘s one for the future, maybe. right now, david adjaye has plenty to keep him busy, not least this project, the planned holocaust memorial in the gardens by the houses of parliament. will gompertz, bbc news. what‘s it like being

a teenager in africa? the bbc spent a day with seventeen year old joy in uganda where he showed us what it‘s like to grow up in the capital kampala. his story is part of a series called being 17, created by the bbc world service and radio1 newsbeat. it looks at how young people all over the world spend their saturdays. lets have a look. uganda is different from other places. when you tell someone you have school six days a week, they are like, what? i want to become an architect, and i cannot achieve that dream if i do not go to school. i‘m done with maths already, i‘m going for technical drawing. it‘s one of my favourite subjects. it starts from here and goes to this part...

uganda is a country with many different tribes. and there are different people from different backgrounds, and all accepted the way they are. after school, i go for band practice in the music room at church. at the moment, we are doing mostly covers but i am working on some original music. over the years, uganda has changed. right now there are more opportunities for women in school and workplaces. # me love the way you handle me, me love the way you fight for me, # me love the way you do all the things for me, love. # the church and my spiritual life are very important to me. writing music is fun for me, and i hate being bored,

so i do all these things to keep active. i would like to go and study abroad, but then eventually i would come back here, i would come back and stay in uganda. it is a nice place to be, generally. huge thanks tojoy there. and we‘ll be hearing more from across the continent in the being 17 series over the coming weeks. the actor clive swift, who starred in the bbc sitcom keeping up appearances, has died at the age of 82 after a short illness. we are not buying rolls—royce. we are not buying rolls-royce. but they don't know that, dear. he played the put—upon husband of hyacinth bucket, one of television‘s most notorious social climbers. his agent said he died at home, surrounded by his family. there have been tributes throughout

the day to the comedian jeremy hardy, who‘s died at the age of 57. he‘d been receving treatment for cancer. he won the comedy award at the edinburgh festival in 1988, but will be best remembered for his appearances on radio 4‘s sorry, i haven‘t a clue. lizo mzimba looks back at his life. actually, i was the youngest of five children, and for that reason i felt a bit weird. i felt i wasn‘t wanted, i thought i was a mistake. and i think that, having had four children, what my mother really wanted was a holiday. jeremy hardy‘s self—effacing style of humour was what made him a star. the finest comedy minds in britain — john oliver, rory bremner and jeremy hardy. his career began as a stand—up in the 1980s and continued for decades on shows like mock the week. in the second world war, it was just a piece of cardboard that said, "this is mr wilkins. he is not a german spy". he inspired us all.

he was very unfussy, very self—deprecating. he always said he wasn't very good at that. he was principled, always principled, compassionate, kind, but just so wonderfully funny. i think it‘s fair to say, though, that the bbc has never practised discrimination. they‘ve always taken on any 0xbridge graduate, regardless of talent. despite jokes at its expense, he became a regular on bbc radio 4 panel shows like the news quiz and i‘m sorry i haven‘t a clue. was your dad a king for a day? he must have been, to make a princess like you. was your dad a pancake chef? he must have been, to make a tosser like you. you talk about lambeth, a cooperative council... a lifelong socialist, his beliefs informed much of his comedy and he frequently campaigned too, on numerous issues. i remember him as a great friend — the otherjeremy. we did lots of events together. he was always giving his time to raise money so other people could speak for them — human rights causes, justice causes. what a loss. more committed to socialism than to singing... # let me alone...#

..he will be remembered for his sharp comic brain, and, as radio listeners knew, a unique way with a tune. cheering and applause the comedian, jeremy hardy, who‘s died, at the age of 57. now it‘s time for the weather with chris fawkes friday was another day with severe transport disruption due to heavy snow. it was across central and southern england that had the worst of it, we also had trouble is around the m2 in kent as well late in the day. some of those problems were pictured from this area overlooking the m3, you can see how horrendous that conditions look there on the main carriageway, completely

covered in snow. transport disruption has been a factor with the forecast through friday, and again into saturday too, with the risk of some snow still around, but ice as well fairly widely. looking at the weather picture over the next few hours, the snow that we have across south—east england is coming confined to kent before easing away. there will be wintry showers across the eastern side of scotland into eastern parts of england, wherever those showers fall of course that adds to the risk of ice with the widespread and sharp frost once again. the forecast for saturday is there will be more wintry weather around, and after a cold and frosty start, icy too, and we will seek showers trickling down the eastern coast, probably saying quite cloudy for part of the morning across the maybe with some flurries, but nothing too heavy. some showers affecting western wales but they will ease with time. we may see a few showers coming in across the north—west of northern ireland into western scotland. again, showers are a bit of a mixture here with some rain around sea level, we could see some sleet sleet and snow mixed in.

saturday, a decent day with some bright or sunny spells after that cold and icy start. temperatures will be struggling once again, looking at another cold day —6 in newcastle, there is the risk of some icy stretches, but further west we will see some cloud thickened as the weather system approaches of the atlantic the sunday. this is going to bring another spell of wintry weather. we could see a few more centimetres of snow, targeting possibly the high ground in northern ireland, but the far north of england and scotland could see maybe 3— six centimetres, but there is a tendency at lower levels will that‘s no transition back to reign as mild air tries to move in from the west. 5—6 for glasgow and belfast. into next week it is all changing, it turns more mild but there will be some heavy rain around as well and it will often be windy. this is bbc news.

the headlines: dramatic new footage has emerged of the moment a dam collapsed in brazil, killing at least 110 people. around 200 more are still missing after the wave of mud and slurry surged down the valley. the fact—checking website snopes and the associated press say they are cutting ties with facebook. media reports last year suggested that fact checkers working with facebook have been frustrated by its lack of transparency.